OK, the Oldsfaq is probably the best source of open forum info out there. However, in my experiance, there are few differences in the 455's in those days. A few key points might be 1) avoid the w-31 cam.Its a good cam for the 70's but we have come a long way. Too much duration, not enough lift. 2) What tranny are you running? some 455s did not have the correct mount for the earlier manual trannys. However, you should not have a problem if your engine is a 70. 3) DONT run a platnium plug. with a 455, the compression and high timing on these causes the platnium tips to fall out. Royal pain in th @ss. 4) Be sure to keep this sucker cool. Mine had a tendancy to get rather warm in summer. Be sure to run a large double core or preferably a triple. The triple core fixed mine. Finally 5) Oldsmobile engines are very unforgiving of water in the Gas. I dont know why, but they just are. Run a bottle of dry gas about once every three months. It seems petty, but it counts. Oh, as a sidenote, if you do manage to cross the 600HP line, dont race it uphill. Trust me, bad move. Wrecks rods/blocks/heads.